POSITION GENERAL DUTIES AND TASKS :

• Governance, Planning & Readiness (Pre-Migration)
• Application & Dependency Assessment
• Identify all applications hosted in Cyberjaya Data Centre, categorizing by:
• Environment: MY PROD / SG DR
• Business criticality (Baseline/Important/Critical)
• Recovery Time Objective (RTO) / Recovery Point Objective (RPO) requirements
• Produce detailed Application Dependency Mapping including:
• Upstream and downstream systems
• External integrations (e.g., CTOS, CCRIS, CBM, SOA gateways, MQs, APIs)
• Shared services (LDAP, SMTP, monitoring tools, batch schedulers)
• Identify hard dependencies such as:
• IP addresses, VLANs
• Hostnames
• Firewall rules
• Certificates

Compliance & Regulatory Alignment

• Validate data residency requirements per BNM, PDPA, and OCBC internal policies
• Confirm segregation requirements for SG DR vs MY PROD environments
• Ensure application architecture complies with:
• Environment isolation
• Access control segregation
• Audit and logging standards

Risk & Impact Analysis

• Perform Application Impact Assessment covering:
• Downtime tolerance
• Batch window sensitivity
• Month-end / quarter-end constraints
• Identify single points of failure Document risks and mitigation, including:
• Migration failure
• Latency impacts
• Data corruption
• Rollback complexity

Design & Architecture Validation

• Network & Connectivity Validation
• Review new network design from Infrastructure/Network teams:
• New IP ranges (if required)
• VLAN separation
• Validate application connectivity assumptions:
• Static IP whitelisting
• Firewall directionality
• Northbound / Southbound traffic flows

Application Configuration Review

• Identify application configurations requiring changes:
• Properties files
• Connection strings
• MQ channels & queues
• API endpoints

Identify hardcoded values that require remediation

• Assess application readiness for:
• IP address changes (if required)
• Hostname changes (if required)
• DNS re-pointing (if required)

Non-Functional Readiness

• Validate expected performance in the re-stacked environment:
• Latency sensitivity
• Bandwidth needs
• Confirm High Availability (HA) and clustering behavior post-restack
• Pre-Migration Preparation
• Environment Clean-up & Standardisation
• Remove obsolete configurations
• Decommission unused application components

Backup & Data Protection

• Ensure recent full backups have been completed
• Validate backup restore tests
• Confirm database/application backup ownership and rollback data retention policies
• Certificate & Security Readiness
• Validate TLS/SSL certificates (if required):
• IP-bound vs hostname-bound certificates
• Expiry checks
• Coordinate certificate renewal or re-issuance if needed
• Review application secrets management (vault references, keystore paths)
• Migration / Restack Execution Support
• Change & Release Management
• Raise and track application change requests (including emergency changes)
• Support Change Approval Committee (CAC) with:
• Impact summaries
• Rollback steps
• Align migration windows with business calendars and batch windows

Application Migration Activities

• Support application shutdown/startup sequencing during restack
• Handle cluster node management if applicable
• Validate configuration updates post-move
• Coordinate closely with Wintel/Unix, Database, Network, and Storage teams

Real-Time Monitoring During Cutover

• Monitor application logs, error rates, and connection failures
• Perform smoke tests immediately after migration
• Provide real-time status updates to WAR room and stakeholders
• Post-Migration Validation & Stabilisation

Functional Validation

• Execute application validation checklist:
• Login, transactions, batch submissions, message flows
• Validate integration with external bureaus and downstream systems
• Confirm batch jobs complete successfully

DR Readiness Validation

• Validate SG DR environment post-segregation:
• Connectivity from SG
• Replication health
• Support DR drills or simulations if required
• Update DR runbooks and procedures accordingly (if required)

Performance & Stability Monitoring

• Monitor latency, throughput, and error spikes
• Support hypercare and transition to Business-As-Usual (BAU)

Documentation & Knowledge Management

• Document Updates
• Update application architecture diagrams, network connectivity diagrams and environment topology (if required)
• Knowledge Transfer
• Brief Support Teams on:
• New environment layout
• New IP ranges and hostnames (if required)
• Update knowledge transfer materials and FAQs

Stakeholder & Communication Responsibilities

• Act as Single Point of Contact (SPOC) for:
• Application Teams
• Business users
• Project teams
• Infrastructure teams
• Provide regular updates on:
• Migration status
• Risk assessments
• Go-Live sign-off confirmation
• Support audit and evidence requests post-implementation
• Post-Implementation Review (PIR)
• Participate in PIR sessions to:
• Capture lessons learned
• Identify gaps and remediation items
• Highlight improvements for:
• Automation
• Configuration hygiene
• Support closure of all change records